Re: Audio very bad after kernel upgrade

[Kent West <westk@acu.edu>]

Ron Johnson wrote:
> On 11/22/08 18:06, Kent West wrote:
> > I went from 2.6.18-6-k7 today to 2.6.26-1-686, and now the audio that 
> > was formerly working is very poor. When I have any audio playing, 
>
> What kind of sound "card"?  Could it be an external USB adapter?

Integrated into the mobo:

00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 
AC97 Audio Controller (rev 50)
       Subsystem: VIA Technologies, Inc. VT82C686 AC97 Audio Controller
       Flags: medium devsel, IRQ 11
       I/O ports at e000 [size=256]
       I/O ports at e400 [size=4]
       I/O ports at e800 [size=4]
       Capabilities: <access denied>
       Kernel driver in use: VIA 82xx Audio
       Kernel modules: snd-via82xx


> > there's a high-pitched whine, that seems to track my mouse movements. 
>
> USB mouse?

Yes. But the noise is there even if I unplug the mouse. Then I notice it 
when I press keys on my PS/2 keyboard.


> > Once the audio stops playing (and in some cases the parent app/window 
> > closed), the audio shuts off with an audible "blip", and the whine 
> > goes away.
>
> That's weird.  I use 2.6.25 (self-compiled from linux-source-2.6.25) 
> with no problems.
>
> > This is true in both KDE and ICEWM. I'm unsure how to go about 
> > diagnosing/fixing this problem other than dropping back to my 
> > previous kernel.
>
> What happens when you play an audio file from the console?  This is 
> always a helpful baseline:
>
> $ speaker-test -t sine

Killing X and using music123 to play an .ogg file (Glenn Miller had some 
fine tunes!), I get the same type of noise.


(I'm having trouble finding speaker-test to use your specific test.)

--
Kent